BroadcastChannel: BroadcastChannel() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2022.

See full compatibility

Note: This feature is available in Web Workers.

The BroadcastChannel() constructor creates a new BroadcastChannel and connects it to the underlying channel.

Syntax

new BroadcastChannel(channelName)

Parameters

channelName: A string representing the name of the channel; there is one single channel with this name for all browsing contexts with the same origin.

Examples

// create a new channel listening to the "internal_notification" channel.

const bc = new BroadcastChannel("internal_notification");
bc.postMessage("New listening connected!");

Specifications

Specification
HTML # dom-broadcastchannel-dev

Browser compatibility

	desktop					mobile							server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS	Bun	Deno	Node.js
`BroadcastChannel()` constructor	Chrome – Full support Chrome 54 (Release date: 2016-10-12) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 38 (Release date: 2015-05-12) footnote Full support	Opera – Full support Opera 41 (Release date: 2016-10-25) footnote Full support	Safari – Full support Safari 15.4 (Release date: 2022-03-14) footnote Full support	Chrome Android – Full support Chrome Android 54 (Release date: 2016-10-19) footnote Full support	Firefox for Android – Full support Firefox for Android 38 (Release date: 2015-05-12) footnote Full support	Opera Android – Full support Opera Android 41 (Release date: 2016-10-25) footnote Full support	Safari on iOS – Full support Safari on iOS 15.4 (Release date: 2022-03-14) footnote Full support	Samsung Internet – Full support Samsung Internet 6 (Release date: 2017-08-23) footnote Full support	WebView Android – Full support WebView Android 54 (Release date: 2016-10-19) footnote Full support	WebView on iOS – Full support WebView on iOS 15.4 (Release date: 2022-03-14) footnote Full support	Bun – Full support Bun 1 (Release date: 2023-09-08) footnote Full support	Deno – No support Deno 1.11 (Release date: 2021-06-08) disabled disabled From version 1.11 users must explicitly set the `--unstable-broadcast-channel` runtime flag.	Node.js – Full support Node.js 15.4 (Release date: 2020-12-09) footnote Full support

Tip: you can click/tap on a cell for more information.

Full support: Full support
No support: No support
: User must explicitly enable this feature.